標題: Lithium Ion Intercalation Performance of Porous Laminal Titanium Dioxides Synthesized by Sol-Gel Process
作者: Tsai, Min-Chiao
Chang, Jian-Chia
Sheu, Hwo-Shuenn
Chiu, Hsin-Tien
Lee, Chi-Young
應用化學系
Department of Applied Chemistry
公開日期: 10-Feb-2009
摘要: We have synthesized novel mesoporous titanate nanosheets by reacting titanium isopropoxide (TTIP) with formic acid. The porous nanosheets were characterized as a new titanate structure with intercalation of formate groups and protons, in the form of HCOOH-intercalated titanate. Most interestingly, TiO(2)-B, a well-known but unusual titanium dioxide phase with great potential in applications in Li-ion batteries, was obtained after the nanosheets were heated above 250 degrees C. Mesoporous nanosheets of HCOOH-intercalated titanate, titanium dioxide with mostly TiO(2)-B and titanium dioxide with traces of TiO(2)-B were obtained by heating the as prepared mesoporous titanate nanosheets at 200, 300, and 550 degrees C, respectively. The method reported here is the first to utilize the sol-gel process to synthesize TiO(2)-B. In addition, different anodes were made from HCOOH-intercalated titanate and titanium dioxide with different ratios of TiO2-B to examine the performance of the charging/discharging capacity in Li ion intercalation. The discharging capacity of titanium dioxide with major TiO2-B can reach 357 mA h/g at the first charging cycle and is highest among TiO(2)-B reports so far.
URI: http://dx.doi.org/10.1021/cm802327z
http://hdl.handle.net/11536/7638
ISSN: 0897-4756
DOI: 10.1021/cm802327z
期刊: CHEMISTRY OF MATERIALS
Volume: 21
Issue: 3
起始頁: 499
結束頁: 505
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